Foreign language communication skills are crucial for today’s business professionals, as they provide opportunities for advancing their career and conducting efficient communication with partners world-wide. The present article and the underlying research explore the implementation of andragogical principles in an online course for Business English. One of the most important principles entails providing conditions for comfortable learning, including, above all, the format of interaction, which ultimately affects its efficiency and organization. The relevance of distance learning is confirmed by current national laws, as well as by social studies that indicate a demand for online classes in Russia. The use of digital technology for the development of adult learners’ foreign language communication allows them to be educated in a setting that simulates their working environment. This would suggest that when organizing adult education, it is recommended to rely on the learners’ professional experience, offer practice-oriented tasks, encourage autonomy and offer authentic, problem-oriented materials in order to facilitate interaction and set off discussions. With all the advantages of the distance learning format, adult learners may, however, encounter difficulties which are to be taken into account. This article presents an online course for Business English, taking into consideration the identified principles of andragogy, specific properties of workplace interaction and particular features of the distance learning format. The research findings may be of practical value for designing and organizing a course in Business English with its methodology based on adult learning theory principles.